Adopt a second girl or a boy

Our first adoption is a girl. We're allowed to choose age and gender. For the second, we were going for another girl but now not sure. Maybe we should adopt a newborn boy. We have a 3-bedroom house. Our daughter is too young to know if she wants a brother or sister. My husband is not as good at parenting so most duties fall on me and he just follows my orders, but he's the one who prefers a boy. What would you choose and why?